A general and efficient PIFA mediated synthesis of heterocycle-fused quinolinone derivatives

A new application of the hypervalent iodine reagent phenyliodine(III)bis(trifluoroacetate) (PEFA) has been developed for the construction of a series of N, O, S-containing heterocycle-fused quinolinone derivatives in a general and efficient way. An alternative approach to the formation of these novel tricyclic heterocycles by a PIFA mediated aryl-heteroaryl coupling reaction is also presented. (C) 2002 Elsevier Science Ltd. All lights reserved.